The 11floors_of_creative_minds.zip file you have requested: Maps Levels Missions / Portal: 11 Floors of Creative Minds Map (1.0) - 1.44mb is not available. Perhaps try browsing all files for the game Portal and upload any files you want to share or are missing. This is the only information we could locate:
Map INSTALLATIONTo install unzip file and place map files into your folder namedSteam/SteamApps/username/portal/portal/maps - Then run Portal and type ''map 11Floors_of_creative_minds'' in Developer console. For more information on Portal, This is qazuar's latest and best Portal map so far. It builds on 11 Floors which go down.